Bass, 34, reunited with his former bandmater earlier this month for band member Chris Kirkpatrick's wedding.

"I'm so glad I went to Chris' wedding because I forgot about some of my old management company people," showbizspy.com quoted him as saying.

"And then we were sitting there talking to Jessie Biel, too, and she gave us a lot of great pointers. And she had some really great ideas

"One really cool idea she had was that, on the invites - because we love our onesies - send out personalised onesies to all our guests so that at midnight after the reception it turns into a pajama party," added the singer who proposed to his boyfriend Michael Turchin in September.